Claw-bar



(ModeL) H. ROBERTSON.

" CLAW-BAR. I N0. 297,849. PatentedApr. 29, 1884.

WITNESSES INVENTOR: wail m' WWW jzm w/ --VVBYVMMW@ ATTORNEYS,

UNITED STATES PATENT QFFICE.

HUGH ROBERTSON, OF BRECKENRIDGE, MINNESOTA.

CLAW-BAR. I

SPECIFICATION forming part of Letters Patent No. 297,849, dated April 29,1884.

' Application filed February 25, 1884. (Model.)

To all whom it may concern:

which similar letters of reference indicate corresponding parts in all the figures.

Figure l is a side elevation showing one of the claws reversed. Fig. 2 is a front elevation. Fig. 3 is a side elevation, partly in section. Fig. 4 is an end view, and'Fig. 5-is a side view, of the bar with the claws removed.

The bar A is chisel-shaped on the extremity of its handle end, and upon the opposite end is formed a convex head, B, having concave sides a. The end of the bar A is slotted to receive a bolt, 0, which clamps the auxiliary claws D D to the sides of the bar A. The inner faces of the claws D are curved to adapt them to the concave sides of the bar A. The points of the claws extend outward from the sides of the bar nearly at a right angle, and

, are slotted to receive the body of the spike to be drawn. The claws near their'points are countersunk to receive the head of the spike, and the sides of the bar A are countersunk in a similar manner. The auxiliary claws D may be both clamped in position for use,when the head of the bar and the outer surface of the to oblong holes in the shanks of the claws, and

- clamps the claws firmly to the bar, preventing them from turning.

My improved claw-bar, although specially adapted for railroad use, may be employed for drawing all kinds of spikes and bolts. Should any difficulty be experienced in insert ing the claws under the head of the spike, the chisel at the end of the handle may be used to form a cavity, into which the claw may be inserted.

With my improved bar spikes may be drawn without bending them, so that they may be used again.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. 1n a'nail or spike extractor, the combination, with the bar with itsenlarged end provided with outwardly curved or concaved faces, of the auxiliary claws with their inner sides of a coincident curvature with the concaved faces of the enlarged end of the said bar, and means for fastening said claws to said bar, substantially as and for the purpose set forth.

2. In a nail or spike extractor, the bar having an enlargement with concaved sides, in combination with the auxiliary claws, with their inner sides of a coincident curvature with the sides of said enlargement of the bar, and having right-angled shanks, and means for reversibly'connecting them to said bar, sub

stantially as and for the purpose set forth.

3. In a spike or nail extractor, the bar provided with an enlargement at one end, said enlargement having concaved or outwardlycurved sides or faces, in combination with the slotted auxiliary claws having their inner sides of a coincident curvature with the concavities of said enlargement of the bar, and the bolt securing the right-angled shanks of said claws to said bar, said bolt passing through a slot in said bar, substantially as and for the purpose set forth. I

' HUGH ROBERTSON.

Witnesses:

EZRA G. VALENTINE, GEOR EW. LAWTON. 

